Free and open access to the earth observation synthetic aperture radar (SAR) satellite images has enabled implementation of landslide time-series monitoring. However, with restriction low revisit period satellite, it is difficult meet requirements dynamic monitoring high temporal resolution. Moreover, multiplication SAR platforms, a corresponding data integration algorithm needed obtain complementary displacement information from every single orbit. In this work, an integrated for...

Amplitude stripes imposed by ionospheric scintillation have been frequently observed in many of the equatorial nighttime acquisitions Advanced Land Observing Satellite (ALOS) Phased Array-type L-band Synthetic Aperture Radar (PALSAR). This type artifact impedes PALSAR interferometric and polarimetric applications, its formation cause, morphology, negative influence deeply investigated. However, this can provide an alternative opportunity a positive way for probing measuring ionosphere...

Damaged building detection from remote sensing imagery helps to quickly and rapidly assess losses after an earthquake. In recent years, deep learning technology has become a favorable tool for image information detection. Based on the characteristics of damaged buildings in images, this paper, framework that considers heterogeneity is proposed. First, local-global context attention module proposed improve feature ability network, which can extract features different directions effectively...

Ionospheric phase delay is a critical error source in Time Series Interferometric Synthetic Aperture Radar (TS-InSAR) for the purpose of monitoring ground surface deformation with SAR data obtained from low-frequency radar systems. Recently, Range Split-Spectrum Interferometry (RSSI) method has been employed to estimate and rectify ionospheric errors TS-InSAR. However, performance RSSI largely restricted by significant linear scale factors resulting current small bandwidth. In this study, we...

Interferometric Synthetic Aperture Radar (InSAR) monitors surface change and displacement over a large area with millimeter-level precision meter-level resolution. Anar fault, length of ~200 km, is located in central Iran. Recent seismological studies on the fault indicated that it approaching end its seismic cycle. Although earthquake imminent, mechanism not well understood. Therefore, understanding discovering remains challenge. Here, we present an approach analysis utilizing combination...

The instability of saline soil foundation affects the safety artificial construction, and may cause ground collapse, building destruction road damage. It is fundamental to reduce potential engineering geological disasters by exploring dynamic evolution soil. Most previous researches were conducted simulated experiments traditional geodetic surveying methods. Restricted limited sampling points, spatiotemporal characteristics difficult find out in a large scale. This paper exploited SBAS-InSAR...

Multiple aperture interferometric synthetic radar (MAI) can measure ground displacements along SAR track. However, MAI measurements may suffer from severe ionospheric error, especially for long-wavelength sensors. This study presents a new approach, azimuth split-spectrum interferometry (AziSSI), to correct errors in measurements. The proposed method straightforwardly resolve phase delay by exploiting two subband interferograms with different centroid frequencies. We utilized groups of...

Significant seasonal fluctuations could occur in the regional scattering characteristics and surface deformation of saline soil, cause decorrelation, which limits application conventional time-series InSAR (TS-InSAR). For extending saline-soil monitoring capability, this paper presents an improved TS-InSAR approach, based on interferometric coherence statistics high-coherence interferogram refinement. By constructing a network refined interferograms, high-accuracy ground can be extracted...

Monitoring glacier dynamics is an effective approach for quantifying the response of glaciers in cold arid mountainous areas to climate change. However, quantification short-term flow mountain cold-dry climates has rarely been reported. This article investigated intra-annual terms velocity and ice thickness changes on Kunlun glacier, a west mountains, using spaceborne synthetic aperture radar (SAR) imagery. We applied improved pixel-offset-tracking small-baseline-subset method (PO-SBAS)...

How to obtain millimeter-scale along-track deformations using phase measurements is still a pending question for InSAR community. Although Burst Overlap Interferometry (BOI) technique makes this seem tractable, most applications of BOI focus on extracting centimeter-scale co-seismic cases. To further improve measurement accuracy, here we propose new time series algorithm towards maximizing the performance and obtaining as high accuracy possible. This has three major steps. The first step...

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Ionospheric phase delay can seriously affect the low-frequency spaceborne synthetic aperture radar (SAR) systems. correction is, therefore, vital to improving measurement accuracy of Interferometric SAR (InSAR). InSAR ionospheric relies mainly on two kinds approaches, i.e., one uses azimuth offsets measures, and other achieves through a range split-spectrum (RSS) technique. However, approaches have different spatial sensitivities ionosphere, but they complement each other. In this study, we...

The use of the conventional interferometric synthetic aperture radar (InSAR) to generate digital elevation models (DEMs) always encounters phase unwrapping (PU) errors in areas with a sizeable topographic gradient. Range split-spectrum interferometry (RSSI) can overcome this issue; however, it loses spatial resolution SAR image. We propose RSSI-assisted In-SAR-derived DEM (RID) method address challenge. proposed approach first applies RSSI prior DEM, used for simulating terrain phases. Then,...

Clarifying the surface and subsurface deformation is important for protecting infrastructures attached to ground reasonably exploiting underground resources. This paper presents an improved model combining environmental factors (i.e., precipitation temperature) with hydrogeological parameters separate saline-soil from aquifer over Qarhan Salt Lake, China. First, vertical derived by 119 ascending 113 descending Synthetic Aperture Radar (SAR) images of Sentinel-1A collected July 2015 May 2020....

As a supplement to time-series interferometric synthetic aperture radar (TS-InSAR), multiple-aperture InSAR (TS-MAI) can measure the spatiotemporal changes in SAR along-track surface deformation. TS-MAI is often applied with low-frequency data (e.g., L-band data) due its ability retain high coherence. However, signal vulnerable ionospheric delays, which significantly degrade measurement accuracy of TS-MAI. This letter presents an approach correct errors A polynomial cubic model employed...

Affected by the natural environmental and human activity factors, significant seasonal differences appear on regional scattering characteristic ground deformation of saline soil. Interferometric decorrelation due to season replacement limits conventional multi-temporal interferometric synthetic aperture radar (MT-InSAR) technique its application in such areas. To extend monitoring capability salt desert area, we select a vast basin soil around Howz-e-Soltan Salt Lake Iran as study area...

Ionospheric Total Electron Content (TEC) is a crucial parameter for monitoring the ionosphere and space weather disasters. Its accurate prediction vital precise applications of Interferometric Synthetic Aperture Radar (InSAR) Global Navigation Satellite System (GNSS). This study proposes novel method ionospheric TEC that considers multiple TEC-related factors. We present random forest Autoformer deep learning with multilayer perceptron (Autoformer-MLP) to predict global by incorporating...

SUMMARY The Greenland Ice Sheet (GrIS) is the largest ice body in Northern Hemisphere. Quantifying spatiotemporal characteristics of its mass change crucial for understanding global climate change. Many studies have been focused on long-term and acceleration, but a more detailed analysis multitemporal signals, including annual, interannual transient variations, still imperative to study periodic Here, we comprehensively characterize changes entire GrIS subregions using variational mode...

Abstract. Because of over-exploration groundwater for a long time, Jiaxing region, northeast Zhejiang province has suffering serious ground subsidence during the past several decades. In this paper, we investigate time series InSAR technique generation maps over region. 25 ENVISAT ASAR images acquired from Jan 2006 to Aug 2010 are used. The results show that taken place in Xiuzhou district, Jiashan county, Pinghu county and Haiyan county. 4 centers, namely Huanggu town Pinghu, Wangjiangting...